MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
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Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
Negative, false
A result that appears negative but fails to reveal a situation. An example of a false negative: a particular test designed to detect cancer of the toenail is negative but the person has toenail cancer
Read the definitionRandom terms
Show more- Leper 1. Someone with leprosy (Hansen disease). The term leper is now in disfavor. 2. By extension, a pariah. A…
- Loiasis The disease caused by the eye worm known as loa loa, a parasite that lives in humans and other primates…
- Endoscopic sphincterotomy An operation to cut the muscle between the common bile duct and the pancreatic duct. The operation uses a…
- Total hysterectomy Hysterectomy: Complete surgical removal of the uterus and cervix. Also called a complete hysterectomy
- Hereditary nonpolyposis colon cancer (HNPCC) An hereditary cancer syndrome which carries a very high risk of colon cancer and an above-normal risk…
- Mouth, dry See: Dry mouth
- Salvage therapy 1. A final treatment for people who are nonresponsive to or cannot tolerate other available therapies for a…
- Spina bifida cystica A bony defect in the vertebral column that causes a cleft in that column. The meningeal membranes that cover…
- Hepatitis E virus The agent responsible for hepatitis E. Abbreviated HEV. For more information, see: Hepatitis E
- Left ventricular assist device See: Ventricular assist device
- Count, absolute CD4 See: Absolute CD4 count
- Attention deficit hyperactivity disorder Der=0> ODYvAlign=top bgColor=#cccccc colSpan=2> vAlign=top width='100%' bgColor=#ffffff>Our Attention deficit…